<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="qs"></div>
    <script src="./src/react.js"></script>
    <script src="./src/react-dom.js"></script>
    <script src="./src/babel.js"></script>
    <script type="text/babel">
        class Jishu extends React.Component {
            constructor() {
                super()
                this.state = {
                    n: 1
                }
            }

            dianji = () => {
                console.log('点击', this);
                const n = this.state.n + 1
                this.setState({ n: n })
            }

            render() {
                return (
                    <div>
                        <h1>{this.state.n}</h1>
                        <button onClick={() => this.dianji()}>点击</button>
                    </div>
                )
            }
        }

        ReactDOM.render(
            <Jishu></Jishu>,
            document.getElementById('qs')
        )
    </script>
</body>

</html>